Klaviyo vs Attentive for SMS Marketing in Ecommerce
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Quick verdict: if SMS is a secondary channel you're adding on top of an email program that's already working, pick Klaviyo — you get native SMS inside the same contact profiles and flows you already use for email. If SMS is becoming your primary revenue channel and you need deeper compliance tooling, two-way texting, and AI copy built specifically for text, Attentive is the more specialized tool, at a price and sales process that reflects it. Here's how the two actually compare for running an SMS program in ecommerce.
Klaviyo built SMS as an extension of an email-first platform; Attentive built its whole product around SMS and added email later. That difference in starting point shows up in pricing, feature depth, and who each tool is actually designed for.
Comparison table
| Klaviyo | Attentive | |
|---|---|---|
| Best for | SMS as an add-on to an existing email program | SMS as the primary channel, with email secondary |
| Pricing model | Published, self-serve; starts around $20/mo, SMS billed via credits | Custom quote, sales-assisted, no published pricing |
| AI features | Predictive CLV, churn risk, AI subject lines | AI copy tuned for SMS character limits and tone |
| Compliance tooling | Standard opt-in/opt-out and quiet-hours handling | Deeper TCPA tooling, granular consent tracking |
| Two-way texting | Limited | Built-in, conversational |
| Data model | Same profiles/segments power email and SMS | Own contact system, generally synced via integration |
| Free plan | Up to 250 profiles | None — quote-based from the start |
Round 1: pricing and how you buy it
Klaviyo's pricing is public and self-serve: plans start around $20/month for email, with SMS and MMS billed separately through a credit system that scales with how many texts you actually send. You can sign up, see the numbers, and start sending without a sales call. Attentive doesn't publish pricing at all — you request a demo, talk to sales, and land on a custom contract based on list size and text volume, typically with a monthly minimum that sits well above Klaviyo's entry tier. That's not necessarily a bad sign; it reflects Attentive targeting brands with established SMS programs rather than someone sending their first campaign. But it does mean you can't budget for Attentive the way you can for Klaviyo before you've had that conversation.
Round 2: how SMS-specific each platform actually is
Attentive's product is built SMS-first in ways that show up in the details: two-way conversational texting that lets a customer reply and continue a conversation rather than just receiving a broadcast, AI copy tools tuned specifically for SMS's character limits and tone rather than adapted from email copy, and compliance tooling — consent tracking, opt-in flows — that goes deeper than what Klaviyo offers out of the box. Klaviyo's SMS is genuinely capable for standard campaigns and flows, but it reads as a strong add-on to an email-first platform rather than a channel built around text as the primary medium. If your SMS program already includes two-way customer conversations or you're sending at a volume where compliance nuance matters a lot, Attentive's depth is the reason brands pay its premium.
Round 3: data and how email and SMS work together
Klaviyo's advantage is structural: the same customer profile, purchase history, and segment logic drive both email and SMS, so a flow can step from an email to a text message using the exact same trigger conditions and customer data without exporting anything between two systems. Attentive's email feature, while functional, runs on a platform originally built around SMS-specific data and sync, which generally means more setup to get email and SMS fully sharing the same audience logic. A brand that wants one unified view of a customer across every channel leans toward Klaviyo for this reason alone, independent of which channel performs better.
Round 4: who each platform is actually priced for
Klaviyo's published, scalable pricing makes it accessible from a brand's very first SMS campaign through meaningful growth, since you're not committing to a contract before you know the channel will perform. Attentive's quote-based, contract-driven model is built for a brand that already has the SMS volume and revenue to justify a bigger, more specialized commitment — and for that kind of brand, SMS-specific features like two-way texting and deeper compliance tooling often earn back the premium. Starting an SMS program with Attentive before you have that volume is usually overpaying for capability you're not using yet.
Which should you pick?
- SMS is new or secondary to an email program that's already working: Klaviyo. Native SMS on the same profiles and flows, with transparent pricing while you test the channel.
- SMS is already a serious revenue channel and you need two-way conversations and deeper compliance tooling: Attentive, once you're ready for the sales process and the higher price floor.
- You're not sure yet: start SMS inside Klaviyo, since it's already included once you're using Klaviyo for email, and revisit Attentive once text volume and compliance complexity actually justify a dedicated platform.
Either way, the platform drafts and sends your messages — it doesn't write the offer that makes someone click. If email is still your main channel and SMS is the piece you're adding, our best AI email marketing tools for ecommerce roundup and our Klaviyo vs Omnisend comparison cover the email side of this decision in more depth. And since SMS marketing carries specific legal requirements under the Telephone Consumer Protection Act regardless of which platform you choose, the FCC's TCPA consumer guidance is worth reading before your first campaign goes out. Try Klaviyo or Try Attentive to see which fits your current list and volume.
Frequently asked questions
Is Attentive only for SMS, or does it also do email?
Attentive added email marketing to its platform, but SMS is still clearly its core product and the reason most ecommerce brands adopt it — the segmentation, compliance tooling, and AI features are built SMS-first, with email functioning more as a complementary channel than a co-equal one. If email is your primary channel and SMS is secondary, Klaviyo's balance runs the other way.
Why doesn't Attentive publish its pricing?
Attentive sells through a quote-based, sales-assisted process rather than self-serve signup, which is common for platforms targeting mid-size and enterprise ecommerce brands rather than solo or small-store sellers. Pricing depends on your contact list size, text volume, and contract length, and typically comes with a minimum monthly commitment well above what a small Shopify store pays for Klaviyo's entry-level plan. If you want to see a number before talking to sales, Klaviyo is the more transparent option.
Does Klaviyo's SMS feature require a separate app or integration?
No — SMS and MMS are native to the same Klaviyo account you use for email, built on the same customer profiles and segmentation, with usage billed through SMS/MMS credits layered on top of your plan. You don't need a separate contact list or a different flow builder to add text messaging once email is already set up.
Which platform is easier to stay TCPA-compliant with?
Both include opt-in collection, required unsubscribe handling, and quiet-hours scheduling, since TCPA compliance is a legal requirement either platform has to support. Attentive's compliance tooling is generally considered more built-out given how central SMS is to its product — things like double opt-in flows and more granular consent tracking — but compliance ultimately depends on how you configure either platform, not just which one you choose.